In March 2022, a video appeared online that seemed to show Ukraine’s president, Volodymyr Zelensky, asking his troops to lay down their arms in the face of Russia’s invasion. The video—created with the help of artificial intelligence(AI)—was poor in quality ...

When OpenAI launched ChatGPT, with zero fanfare, in late November 2022, nobody inside the company was prepared for a viral mega-hit. It was viewed in-house as a “research preview,” a tease of a more polished version of a two-year-old technology ...